verb (used with object), ne·ces·si·tat·ed, ne·ces·si·tat·ing.
- to make necessary or unavoidable: The breakdown of the car necessitated a change in our plans.
- to compel, oblige, or force: The new wage demand will necessitate a price increase.
- to cause as an unavoidable and necessary result
- (usually passive) to compel or require (someone to do something)
n.1650s, noun of action from necessitate. v.1620s, from Medieval Latin necessitatus, past participle of necessitare “to render necessary,” from Latin necessitas (see necessity). Earlier verb in English was necessen (late 14c.). Related: Necessitated; necessitates; necessitating.